Sawmill set-works.



G. W. WILLEN'.

SAWMILL SET WORKS.

'APrLIoATIoN FILED 11mm, 1907."y

Patented .12111.31, 1911.

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C. W. WILLETT.

SAWMILL SET WGRKS. APPLIOATIoN FILED 1130-14, 1907.

. Patented Jan. 31, 1911.

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G. W. WILLETT. SAWMILL4 SET WQRKS. MPLIUATION PILE DBO. 14, 11907.

Patented Jan. 31, 1911-.

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APPLICATION FILED DEO. 14, 1907.

Patented .131131, 1911.

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CHARLES W. WILLETT, 0F TAGOMA, WASHINGTON.

SAWIVIILL SET-WORKS.

Specification of Letters Patent.

Patented J an. 31, 1911.

Application filed December 14, 1907. Serial No. 406,539.

To all wlmi/nit may concern:

Be it known that I, CHARLES WV. IVILLETT, av citizen of the UnitedStates, residing at Tacoma, in the county of Pierce and State oflVashington, have invented a new and useful Improvement in SawmillSet-Works of which the following is a specification, reference being hadtothe accompanying drawings.

My invention relates to that class of machines used in saw mills,commonly'known as power set-works, and which set the Sliding, logholding knees forward and backward on the head blocks of the usualsawmill carriage.

Theobject of my invention is to provide in a power set-works, having aself contained mechanism, the transmissionof power from the set worksdirectly to the setting shaft, without intervening gears, frictiondevices and other mechanism commonly used, which allow of much lostmotion,r and an arrangement by means of which the set` -tmg mechanismand forward movement of the setting knees can be promptly and accuratelycontrolled and locked,fso that n unintended movement can result.

I attain these objects and other advantages by the mechanism,construction, combination, and arrangement of parts illustrated in theaccompanying drawings, which form a part hereof.

It is well known that while bevel or miter gears and other devices havebeen provided in set-works to transmit power at right angles fromdriving shaft to settingv shaft, it is equally well known that none ofthese mechanisms provide the needed or best ratio of speed as betweendriving and setting shafts, without employing great numbers of parts insuch devices, all of which arrangements invariably cause loss of powerand a large aggregate of back lash as well as in increased cost ofmanufacture and mainte nance. It is imperative that back lash and allother lost motion should be eliminated from the setting mechanism tosecure accurate and prompt movement of the setting' knees.` It is toovercome these objections and disadvantages and to secure greatereconomy in construction and operation that I have sought out andprovided a set-works wherein I attain a low speed for the setting shaft,

-and a high speed for the main driving shafts and the belts; all ofwhich insures the greatest effective operating result and provides adevice novel and useful.

Figure l is a left side elevation. Fig. 2 is a rear elevation. Fig. 3 isa front elevation. Fig. l is a vertical sectional view on the line EMBof Fig. 1. Fig. 5 is a vertical sectional view on the line lc-A of Figs.2-3. Fig. 6 is a detail plan view on enlarged scale also showing theindicators. Fig. 7 is a right side elevation. Fig. 8 is a detail view ofa front elevation of the dial carrier clutch upon an enlarged scale.Fig. 9 is an enlarged cross sectional view on the line AMA of Figs. 2 3showing the hand wheel, dial carrier, and clutch for same, withsomeother adjacent parts.

In Figs. 1-7 the sprocket chain 2Q, which operates the toothed wheels20u21 is omitted from its position as elsewhere shown, in order to makethe adjacent parts more clearly visible in these views, but it isunderstood that the sprocket chain is intended to be a part of themechanism the same as shown in the other ligures, forthe purpose of thisspecification. 1-26-7-8-9 are drawn upon a scale somewhat larger thanFigs. 3--t-5, for the purpose of better illustration. y

Like letters or numerals refer to like parts throughout the views.

C is the sawmill carriage frame or platform, only a portion of which isshown, but

'which portion is intended. to snthciently indicate the position of theset works thereon,

and as they are secured upon the entire carriage.

D representsone of the knees of a sawmill carriage, against which thelog secured when upon the carriage in position for sawing. provided.

E is the frame of the set-works which is vertically divided into the`two members e--e, the same being bolted together.

F is a belt or cable, by means of which power is transmitted from aconvenient source. This belt extends over a driving pulley 7 and anidler pulley 7 located at opposite ends of the carriage traveling way,the belt being shown with a portion broken away to avoid usingunnecessary space upon It is also stated that Figs.A

A suitable number of rsuch knees are"L the sheet. The belt is alsoarranged to extend under idler pulleys 8-.8 mounted on the carriage sideby side in the same vertical plane with and just above the pulleys 7 7and below the set-works mechanism, so thatv it can pass over and drive apulley 9 xedly secured to the end of the shaft 10 of the set-works. Thepower is then transmitted from this point through the set-worksmechanism to the set shaft G, which latter, in rotation, moves the kneesto the desired position, all of which I will now more fully describe.The set shaft Gr is of common sawmill type, extending` longitudinally ofthe carriage and in a suitable position thereon on the side opposite thesaws. It is journaled in head blocks which carry the sliding knees andthese are pro-vided with means to be moved by the shaft G.

The driving shaft 10 is mounted in an eccentric sleeve 11, the drivingpulley 9 being fixedly keyed on one end of the shaft and a drivingfriction pinion 12 being rigidly mounted on the opposite end. A rotatingshaft 14 is mounted in bearings 15-15 of the frame E at a suitableheight. On one end of the shaft 14 is xedly keyed a friction wheel 13having a broad rim and a hub, between which the friction pinion islocated in a position adapting it to be brought into engagement witheither. On the central part of the shaft 14 is fixedly secured a wormgear 16 formed and placed to engage a worm wheel 17 above it. Within theframe E, in a higher plane and transversely to the shaft 14, isrotatably mounted a shaft 18 in bearings 19-19 Figs. 1-7. The worm wheel17 is rigidly keyed upon the shaft 18 in a suitable posit-ion thereon. Abox which is a part of the frame E entirely incloses the gear 16 andworm wheel 17, (which is intended to run in oil), and thus protectsthese parts from dust and foreign mattei;

Near one end of shaft 18 is {ix-edly keyed a sprocket wheel 20. On theshaft G, within a vertical plane below the sprocket wheel 20 is tixedlykeyed another sprocket wheel 21 and these two sprocket wheels areconnected by a link chain 22. The shafts G and 18 are provided with anadjustable separating strut 23, having bearing ends 24-24, one formedwith a right thread and the other with a left thread to receivecorresponding threads on the respective ends of the strut and allow itsadjustment. The bottoms o-f the members c-e of the frame E are providedwith slots 67, adapted to receive bolts 68 Figs. 2 3, which secure theframe to the carriage, and by this means the frame can be adjusted tothe carriage in a manner to take up any wear of the link chain orsprocket wheels. 0n the end of the shaft 18, opposite the sprocket wheel20, a dial carrier clutch 25 is rigidly keyed, the clutch being a wheelhaving the teeth 26 upon its outside face at the outer margin thereof.These teeth 26 are angular in form and are so cut that the workingsurface of each tooth makes an angle of about thirty degrees with theplane in which the tooth and the axis of the shaft 18 lie, while theback surface thereof -makes an angle of about sixty degrees therewith.The end of the shaft 18 is reduced in diameter, and upon that end isrotatably mounted a sleeve 27, the outer cylindrical surface of which isthreaded. A hand wheel 28 is integral with or fixedly secured to thesleeve 27. This hand wheel is provided with a lug 61 on the insidesurface of its rim, which lug is adapted to engage a rubber or leatherblock 62 tixedly secured to the face of the dia-l carrier 29. In Fig. 3the hand wheel is partly broken away, disclosing the block 62 behindsame. The dial carrier 29 is carried upon the sleeve 27 which isthreaded to receive corresponding threads in the dial carrier, thesethreads being so formed as to permit a rapid movement of the dialcarrier to and from the clutch 25. The face of the dial carrier 29,which is adjacent to the clutch 25, is provided with teeth 26 thereonadapted to engage and fit between the teeth 26 of the clutch 25, saidteeth 26 being complementary in form to the teeth 26.

On the outer `cylindrical surface of the dial carrier 29 is fixedlysecured a setting dial 30, in the outer surface of which is cut ahelical groove 31, suit-ably graduated with a board measure scale. Onthe outer margin of the dial carrier 29 is a stop lug 32. A dialindicator 33 is slidably mounted on the shaft 34 which is rigidlymounted in a boss 35 of the frame E. Attached to the indicator 33 is afinger 36 which slides in the groove 31.

A lever 37 is fixedly. secured in a suitable position on the eccentricsleeve 11. On the outer end of the lever 37 is pivotally mounted a rod38, the lower end of which is threaded to receive lock nuts 39. In asuitable bearing in the e member of the frame E is pivotally mounted ashaft 40 and on one end of said shaft is rigidly secured an arm 41,horizontally forked at its outer end. The lower end of the rod 38 passesthrough a vertical opening in ay transverse pivot pin 42 in the fork ofthe arm 41. An arm 43, also forked at its outer end is rigidly keyednear by on the shaft 40. A vertical stop bar 45 is pivotal-ly securedat.its lower end to the end of the arm 43, by a. bolt 44. A

sto-p lug 32 on the dial carrier 29 is so formed and placed that it willengage the stop bar 45, which in turn, through intervening mechanism,depresses the lever 37 and permits the rotation of the eccentric sleeve11, which disengages the friction pinion 12 and friction wheel 13 and socauses the shaft 18 to be stopped from rotating, in any pre-determinedposition. On the endof the shaft 4:0, opposite the lever arm 4:1, adouble lever is lixedly keyed at its center and to the free ends of thelever G5, a brake strap 66 is secured, the same extending upward andover the friction wheel 13. To the Lipper enel of the stop bar 45, ablock 4-6 is formed integral therewith and at right angles thereto.Through said block is secured a pin 11T carrying a finger 118 adapted toslide in the helical groove 31 in the surface of the dial 30. On t-heupper end of the stop bar 4c is tixedly secured a leather impact block63 adapted to receive the impact of the lug 32.

In the shaft 18 spur gear teeth 49 are formed. On the shaft 34 isrotatably mounted a toothed wheel 50 adapted to enthe teeth L19 on theshaft 18 and be rotated thereby. FiXedly secured to the Wheel 50 is a.distance registering dial 51, having a helical groove in its outercylindrical surface. Secured to the frame 'E is a rod 52 on which .isslidably mounted a sleeve 53, carrying a dial indicator 54k, the finger55 of which is adapted to engage the helical groove in the dial 51 whichhas a graduated scale thereon. This dial indicates the distance from theface of the knee to the vertical plane of the saw. The larger dial 30indicates the distance which it is desired the knees shall be moved whensetting them.

Fixedly secured to the eccentric sleeve 11 is a hand lever 56 and to thecentral part of said lever is pivoted a rod 57 adapted to slide througha bracket 58 on the frame E, carrying adjustable lock nuts 5959. Springs(5060 rest between the bracket 58 and lock nuts 59-59 retaining thelever 56 in its central position.

lt will now be seen that the operation of my machine is as follows. rlhehand wheel 28 is so mounted and arranged that with a very littlerotation it will. rapidly move the dial carrier 29 toward or away fromthe dial carrier clutch 25 and thus lock the carrier with the clutch orunlock same therefrom. Thus the hand wheel is rotated to the left untilthe lug G1 engages the rubber' block ($2 of the dial carrier 29, whichmove ment of the hand wheel releases said dial carrier from the dialcarrier clutch 25 and permits free rotation of the dial carrierthereafter. TWhen the dial carrier 30 is rotated to the left, the finger,L8 following the helical groove causes the stop bar Ll5 to move toclear the stop lug 32 and upon a reverse movement to be moved intoposition to engage the lug. The dial now being free it is rotated to theleft until the dial pointer 36 indicates the distance which it ispredetermined the knees shall be moved, to saw material of the desiredmeasure. The dial is then retained in a stationary position by a slightpressure of the hand, while the operator rotates the hand wheel with theother hand slightly to the right, when the dial carrier teeth 26 engagethelocking teeth 26 of the dial carrier clutch and thus the dial carrieris locked in its lixed position. The shaft 10 carried in the sleeve 11is at this time being rotated by transmission of the power to the drivenpulley 9 on said shaft. The operator then grasps the hand lever 56 andmoves the friction pinion 12 into engagementwith the outer rim of thefriction wheel 13, causing the latter to rotat the shaft 18, and thus inturn to rotate the sprocket wheel 20 thereon, and from which by means ofVthe link chain 227 motion is transmitted to the sprocket wheel 21 onthe set shaft G, which thus rotates and sets the knees forward thedesired distance. The same :movement of the shaft 18 rotates the dial.30 until the stop lug thereon engages the upper end of the stop bar 4&5,provided with an impact leather block G3. When the stop bar l5 thusengaged by the lug 32 the said lever mechanism shifts the frictionpinion 12 out of engagement with the friction wheel 13 and thus shutsoff the power in course of transmission thereto, causing said wheel 13to stop. ln order to overcome the inertia of the said wheel 13 and otherrelated moving parts, I have provided a friction brake strap 66 and thelever mechanism through which it is automatically operated in engagingthe friction wheel. When the dial carrier lug 32 engages the stop bar45, the shaft 18 is instantly stopped from rotating by reason of therelease of the friction pinion 12, and the movement of the brake leverwhich causes the friction brake to be applied. In this manner throughthe intervening link chain and sprocket wheels 20-21, the set shaft Gris stopped and by its auxiliary mechanism holds the sliding knees in apredetermined position as aforesaid. It will also be seen that a reversemovement of the handy lever 5G will cause the friction pinion 12 toengage the hub 69 of the friction wheel 13 and tlnis through theintervening mechanism. to rotate the set shaft Gr in a reverse directionfrom that already described, and enables the operator to recede theknees from the saws any desired distance; whereupon a release of thehand lever 56 causes the springs (SO-GW to move the same to its centralposition and shifts the friction pinion 12 free of engagel'nent with thehub of the wheel 13 retaining the same there, and thus through theintervening mechanism to stop the hnees at the place desired.

l have arranged suitable means for properly adjusting the various partsof my device so that the functions of the different parts of themechanisms described, shall be performed by them in working harmony, andat the same time permit of further adjustment to such positions as maybe necessitated by the usual wear of parts. It will likewise be notedthat the use of a worm gear in a power set-works, primarily to lock andhold the setting mechanism, as well as the arrangement of said gear totransmit power at right angles, is novel, as it most effectuallyeliminates any back lash and consequent lost motion, and insures mostaccurate results. The use of a worm gear in a,this connection enables meto accomplish a rened accuracy in a setting mechanism, much desired andlong sought, but hereto. fore not attained.

Having thus fully described my invention I claim:

1. In automatic power arresting mechanism for power set works, thecombination with a frame; a rotating shaft mounted in eccentric bearingstherein, and having a friction pinion secured on its end; a shaft 14mounted in the frame and driving, through intermediate means, thesetting mechanism and the set controlling mechanism, and having afriction wheel mounted thereon adapted to be engaged and driven by saidfriction pinion; a lever secured to the eccentric bear'- ing whereby thepinion is thrown into or out of engagement with the friction wheel; alever pivoted to the frame; a tension link connecting the last twolevers together; a stop-bar operatively secured t-o said last lever; adial driven by said shaft 14; and revolubly adjustable relativelythereto; a lug formed on said dial and adapted to engage and operatesaid stop-bar; and screw mechanism comprising a helical groove formed inthe dial and a finger engaging said groove and mounted on said stop barwhereby the stop-bar is brought into position to be engaged by said lugwhen the dial has turned a predetermined distance.

2. In a setting mechanism for power set works, the combination with aframe; a knee-setting shaft mounted therein; an eccentric sleeve mountedin said frame; a driving shaft mounted in the sleeve; a friotion pinionsecured to said shaft; a friction wheel mounted in said frame and havingfriction surfaces adjacent to opposite sides of said friction pinion,one of said surfaces being adapted to be engaged by said pinion whensaid eccentric sleeve is turned to throw the pinion on one side of thenormal while the other surface is engaged thereby when said sleeve isturned to the other side of the normal; a worm gear operatively securedto said friction wheel; a worm wheel mounted in said frame and engagingsaid worm gear;

a sprocket gear operatively connected to said worm wheel; and means totransmit vthe power from said sprocket gearing to the knee-settingshaft.

3. In a set controlling mechanism for a power set works the combinationwith a frame of a set shaft mounted therein; a shaft mounted therein andoperatively connected to the set shaft; a clutch mounted on andturningwith said shaft; an independently rotatable sleeve mounted onsaid shaft and having screw threads on its outer surface; anindependently rotatable dial mounted on said sleeve and engaging thescrew threads thereon, and adapted to engage said clutch or to bewithdrawn therefrom; an indicator mounted on said frame adjacent to saiddial; lugs mounted on said dial and sleeve and adapted to limit therelative rotatory motion therebetween; a stop-lug formed on said dial;and power controlling means adapted to be engaged by said stop-lug whensaid dial has turned through a predetermined distance.

4. In a power set works, the combination with a saw mill carriage, kneesmounted thereon, a set shaft, and mechanism operatively connecting theset shaft to the knees; of a frame mounted on said carriage; a settingmechanism mounted on said frame and comprising a power-'driven shaft, aneccentric bearing for the shaft, a friction pinion on the power-drivenshaft, a friction wheel adapted to be engaged by the friction pinion, aworm gear operatively connected to the friction wheel, a worm wheelengaging said worm gear, and means operatively connecting the worm wheelto the set shaft; a power arresting mechanism mounted on said frame andcomprising a lever secured to said eccentric bearing to move the pinionout of engagement with the wheel, a pivoted lever, a tension linkjoining the two levers, and a stop-bar operatively connected to the lastlever; and a set controlling mechanism, comprising a clutch operativelyconnected to the worm wheel, an independently rotatable sleeve coaxialwith said clutch and having screw threads on its outer surface, anindependently rotatable dial mounted on said sleeve and engaging thescrew threads there'- on and adapted to engage said clutch or to bewithdrawn therefrom, an indicator mounted on the frame adjacent to thedial, lugs mounted on the dial and sleeve and adapted to limit therelative rotatory motion therebetween, and a stop-lug formed on saiddial and adapted to engage and actuate said stop-bar whereby therotation of the set shaft is arrested when said stop-lug has turnedthrough a predetermined distance.

5. In a power set works, the combination with a frame; a shaft mountedtherein and operatively connected to the set shaft; a

Il l) screw threaded dial driven by said shaft and revolubly adjustablethereon and having rotatory motion therewith; a stop-lug formed on saiddial; means for driving the set shaft; means for disconnecting saiddriving means; and a stop-bar adapted to operate said disconnectingmeans when en gagcd by said stop-lug, and engaging the screw thread onsaid dial whereby said bar is brought into the path of the travel ofsaid lug when said lug has turned through a predetermined distancethereby permitting the lug to turn more than one revolution if desired.

G. In a saw mill set works, the combination with a set shaft, powerdriven means for driving the set shaft, and means for controlling theconnection between said power driven means and said set shaft; of a diskdriven with the set shaft and having angular teeth projecting therefrom;an independently rotatable sleeve coaxial with said disk and havingscrew threads on its outer surface; a second disk mounted on said sleeveand engaging the threads thereon and having angular teeth projectingtherefrom, said teeth being similar' and complementary to the teeth onsaid rst disk, said second disk being adapted to engage with its teeththe teeth of said first disk or to be withdrawn therefrom; lugs mountedon said second disk and sleeve to limit the relative rotatory niotiontherebetween, whereby thev rotation of said sleeve in one directionfirstreleases the teeth of said disks from engagei'nent and then rotatessaid second disk relatively to said first disk, and in the oppositedirection brings the teeth of said disks into locking engagement todrive the second disk with the set shaft; and a lng carried by saidsecond disk and adapted to engage said means for controlling theconnection between said power driven means and said set shaft todisengage the said connection.

7. In a saw mill set works, the combination with a set shaft, powerdriven means for driving the set shaft, and means for contr i lling theconnection between said power driven means and said set shaft; of a diskdriven with the set shaft and having angular teeth projecting therefrom;an independently rotatable sleeve coaxial with said disk and havingscrew threads on its outer surface; a. second disk mounted on saidsleeve and. engaging the threads thereon and having angular teethprojecting therefrom, said teeth being similar and complementary to theteeth on said first disk, said second disk being adapted to engage withits teeth the teeth of said first disk or to be withdrawn therefrom;lugs mounted on rsaid second disk and sleeve to limit the relativerotatory motion therebetween, whereby the rotation of said sleeve in onedirection first releases the teeth of said disks from engagement andthen rotates said second disk relatively to said first disk,and in theopposite direction brings the teeth of said disks into lockingengagement to drive the second disk with the set shaft; a lug carried bysaid second disk and adaptedr to engage said means for controlling theconnection between said power driven means and said set shaft todisengage the said connection; and means for determining the extent ofrevolution of said second disk relative to said first disk whereby theextent of movement of said set shaft is predetermined. i

S. In saw mill set works the combination with the set shaft, a drivewheel and means for operatively connecting said wheel and shaft, of anindex wheel movable independently of the set shaft for determining theset, and having a spiral, a connection working with said spiral andadapted to disengage said means when the index wheel is returned to homeposition, and means for locking said index wheel to turn with thesetshaft,

9. `In saw mill. set works the combination with the set shaft, a drivewheel and means for operatively connecting them, of an index wheelmovable independently of the set shaft for determining the set andhaving a spiral, a rocker shaft connected with said means and providedwith an arm, a link connected with said arm and engaging said spiral,for throwing said means out of engagement when the index wheel isreturned to home position, and means for locking the index wheel to turnwith the set shaft.

10. In saw mill set works the combination with a power transmittingwheel, of an index wheel concentric therewith and .movable relativethereto, a device for locking the index wheel to the power wheel., and ahand wheel capable of limited movement independently of the index wheel,and a connection with said locking device adapted to release the indexwheel from the power wheel with the initial movement of the hand wheelin one direction.

11. In saw mill set works the combination with thc set shaft, a drivewheel and means for operatively connecting them, of a powertransl'nitting wheel, an independently movable concentric index wheel,mechanism controlled thereby which, when said wheel returns to the homeposition, disengages said means, means for locking the index wheel withsaid power transmitting wheel, and a hand wheel for operating said indexwheel to determine the set, adapted by its initial backward movement todisengage said lock ing means and release the index wheel from the powertransmitting wheel.

12. In saw mill set works the combination with the set shaft, a drivewheel and means for operatively connecting them, of a power to throw theSaid means out of engagement transmitting Wheel, an independentlymovwhen the index Wheel is returned to home able index Wheel concentricwith Suid power position.

transmitting Wheel and provided With a spi- CHARLES lV. VILLETT. rail,means for looking said index Wheel to lVitnessed bysaid powertransmitting Wheel, and a con- JULIAN CLOUGH,

nection engaging said spiral and adapted WM. P. HOPPING.

